Fix footer count update for multi-table pages

The initial footer count update was selecting all tables on the page
at once for the update, so the count was a sum of all visible rows
on the page.

Fixes bug #1131522.

Change-Id: Iff85ec8533ed62c01d91a21d7f7ea35dcfbf1417
pin django to 1.4.x stream

django 1.5 just released in the last hour, and there is a
compatibility issue with it and horizon causing gate failures.

Pin this so that we can get back to business and let the horizon
team address django 1.5 when it makes sense to them.

Change-Id: I6ddf9623f8a4719b1cb82b118c1876373051fd28
Merge "Fix footer count update for multi-table pages"